noun the use of plants to extract heavy metals from contaminated soils and water Also called phytoremediation bioremediation (bī’ō-rĭ-mē’dē-ā’shən) The use of biological agents, such as bacteria, fungi, or green plants, to remove or neutralize contaminants, as in polluted soil or water. Bacteria and fungi generally work by breaking down contaminants such as petroleum into less harmful substances. Plants can be used to aerate polluted soil and stimulate microbial action. They can also absorb contaminants such as salts and metals into their tissues, which are then harvested and disposed of. ◇ The use of green plants to decontaminate polluted soil or water is called phytoremediation. bioremediation [(beye-oh-ri-mee-dee-ay-shuhn)]

having clear or sharp eyesight. having or marked by keen perception or sound judgment: a clear-sighted, analytical approach. Historical Examples Selections From American Poetry Various Changing Winds St. John G. Ervine British Quarterly Review, American Edition, Volume LIV Various The Book of Khalid Ameen Rihani North and South Elizabeth Cleghorn Gaskell Cyropaedia Xenophon A Popular […]

clerestory. Architecture. a portion of an interior rising above adjacent rooftops and having windows admitting daylight to the interior. a raised construction, as on the roof of a railroad car, having windows or slits for admitting light or air. Historical Examples How France Built Her Cathedrals Elizabeth Boyle O’Reilly Bell’s Cathedrals: The Churches of Coventry […]

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